Essilor International

Essilor International Charenton-le-pont

Sylvain Chene

Romain Fayolle

Pascal Allione

Laurent Calixte

Xavier Levecq

Bruno Fermigier

Jean Sahler

Anne-Catherine Scherlen

Sarah Marie

Céline Benoit

Amandine Debieuvre

Samy Hamlaoui

Stéphane Perrot

Loïc Baillon

Susana Montecelo

Delphine Tranvouez

Florian Caleff

Mélanie Tessieres

Alain Goulet

Wissam Mouallem

Fermigier Bruno

The disclosure relates to an optical article comprising an optical lens shell having an internal surface, a support element mounting said shell, disposed in a fixed position, and movably mounting a moveable element between a first position and a second position. The optical article further comprises a sealed cavity, placed between the moveable element and the internal surface of the shell. The optical article is switchable between a first configuration, in which the moveable element is passively held against the shell and a second configuration, in which the cavity is filled with a predetermined amount of a fluid altering the propagation of visible light and the moveable element is released from the shell by the pressure exerted by the fluid in the cavity. The disclosure also comprises a corresponding method for controlling said optical article.

Fluidic optical article with a mobile element and method for controlling same

The disclosure relates to an optical article which comprises a hollow chamber and a separator separating the hollow chamber into a first subspace and a second subspace. The separator comprises an aperture. The optical article comprises a deformable membrane, attached, in the second subspace, along a closed line surrounding the aperture. The optical article is switchable, by deformation of the membrane, between at least three states (ST, ST, ST). Each state corresponds to a different optical function. The disclosure also comprises a corresponding method for switching said optical article between at least two of the three states.

Three-state optical article and method for controlling same

Disclosed is a method wherein the following steps are performed: a) the subject is placed in a natural posture, in which at least one of the gaze directions of the subject points to a visual target, b) an image capture apparatus is placed between the head of the subject and the visual target, c) the relative posture of the image capture apparatus and head of the subject is adjusted in order for the pupil of the image capture apparatus to be positioned close to the gaze direction of at least one of the eyes of the subject, d) an image of the head of the subject is captured, and e) the at least one geometrico-morphological parameter is deduced from this image.

Method for determining at least one geometrico-morphological parameters of a subject in a natural posture for determining a vision correction equipment

Disclosed is a binocular optoelectronic device wearable by a user for measuring a light sensitivity threshold of the user, including: a diffuser configured to face eyes of the user; at least one light source for emitting light toward the diffuser. The diffuser includes predetermined parameters allowing to provide a quasi-homogeneous light diffusion to at least one eye of the user from light emitted by the at least one light source.

Wearable binocular optoelectronic device for measuring light sensitivity threshold of a user

A method is implemented by a computer for modifying a non-dioptric parameter of an optical system including a first and a second surface. The method includes a modifying step during which the first surface and second surface are modified so as to obtain a modified optical system such that the dioptric function of the modified optical system is substantially the same as the dioptric function of the optical system.

Method for modifying a non-dioptric parameter of an optical system

Method for optimizing an optical lens equipment for a wearer Method for optimizing an optical lens equipment for a wearer, the method comprising:&#x2014;an eye tracking device providing step, during which a spectacle frame mounted eye tracking device is provided to the wearer, &#x2014;a wearer parameter monitoring step, during which at least one parameter relating to the eyes of the wearer is monitored using the eye tracking device and&#x2014;an optimization step during which the optical lens equipment is optimized based at least partly on the base of the monitoring of the at least one parameter during the wearer parameter monitoring step.

Method for optimizing an optical lens equipment for a wearer

The invention provides a method for determining a geometrical parameter of an eye of a subject, such as for determining the position of a center of rotation of the subject's eye, such as for the purpose of personalizing the optical design of corrective ophthalmic lenses, wherein at least two images of the eye are captured with an image capture device while the subject looks in two different gaze directions, and on each image, the pupil and/or the iris of the eye are identified so that a geometrical parameter may be determined for determining a position of a center of rotation of the eye without requiring use of a reference accessory.

Method for determining a geometrical parameter of an eye of a subject

The invention relates to a device for determining the position of a characterizing point of an eye of a wearer provided with a spectacle frame (), including: at least one image sensor apparatus (); and positioning element for positioning the image sensor device relative to the spectacle frame (), such that, when the spectacle frame is arranged in a useful position on the head of the wearer, the image sensor apparatus is capable of capturing an image of the eye of the wearer; and element for determining the position of a characterizing point of the eye from the at least one image of the eye of the wearer captured by the image sensor apparatus. The invention also relates to a method for determining the position of a characterizing point of an eye of a wearer, a device and a method for determining the direction of the gaze and a method for determining associated areas of wear of an ophthalmic lens.

Devices and methods for determining the position of a characterizing point of an eye and for tracking the direction of the gaze of a wearer of spectacles

Method for determining an ophthalmic lens which comprises an aspherical continuous layer and an aspherical Fresnel layer. The aspherical continuous layer is supported by one of the faces of the lens, the same holds for the aspherical Fresnel layer.

Method for determining an ophthalmic lens comprising an aspherical continuous layer on one of its faces and an aspherical Fresnel layer on one of its faces

The invention relates to a method and to apparatus for contactlessly measuring the curvature of an ophthalmic article () having a 'front' face (B) that presents said curvature. The method consists in: sequentially emitting at least two light beams (L, L) onto said front face, these two light beams being offset by a certain angle (&#x3b1;) and converging substantially onto said front face, one of said emitted light beams (L) being substantially centered on said front face and being substantially normal to said front face; analyzing the wave fronts of the resulting reflected beams (L', L&#x2032;) in order to determine their respective focuses (F, F) therefrom; and deducing the radius of curvature of said face; said operations being performed in such a manner that said emitted beams are substantially not reflected by the rear face of said article.

Growing community of inventors

Charenton-le-Pont, France

Sylvain Chene